Crossword Genius

He changes colour (4)

Ross

I believe the answer is:

dyer

I'm a little stuck... Click here to teach me more about this clue!

'he changes' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

'colour' is the wordplay.
I cannot quite see how this works, but
'colour' could be 'dye' (dyeing is a kind of colouring) and 'dye' is present in the answer.
A single letter 'r' remains which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for dyer that I've seen before include "Cloth-stainer" , "One colouring cloth" , "colourist" , "Cloth stainer" , "He changes colour, as it were" .)

I've seen this clue in The Globe and Mail.
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